. "\"The process that gives rise to the swim bladder. This process pertains to the initial formation of a structure from unspecified parts. The swim bladder is used by some fishes to maintain buoyancy and may function in addition as a sound producing organ, a sound receptor, and a respiratory organ.\" [GOC:mh]" . . "swim bladder formation" . "gas bladder biosynthesis" . "gas bladder formation" . .